What Is The Second Time Zone?

You can set the second time zone when you are travelling and entering another – i.e., a second – time zone. To set the current time for the second time zone, you first need to enter the CardioCompact settings area (by pressing MEM and START simultaneously in alarm-clock mode). Now set the date and time of the first time zone. You can then set the time for the second time zone simply by setting the hour difference from the first time zone. The date and time automatically adjust based on the hour difference you enter. 

If you do not want to set a second time zone, set the hour difference to "0".
Note: Please note that the Alarms 1 and 2 are both active for the configured first time zone.